APPROXIMATE SUBSTITUTION ELECTRICAL ЕQUIVALENT CIRCUIT OF EXPLICIT POLE SYNCHRONOUS GENERATOR FOR ANALYSIS OF LOADING OPERATING MODES AUTONOMOUS WIND-ELECTRIC AND HYDROELECTRIC INSTALLATIONS

• Дата: 2020
• Автори та афіліації: P. Vasko — Institute of Renewable Energy of the National Academy of Sciences of Ukraine, 02094, 20А Hnata Khotkevycha St., Kyiv, Ukraine.
• Ключові слова: keywords
• Автор: Vasko, P.
• Формат: Стаття
• Мова: Українська
• Опубліковано: Institute of Renewable Energy National Academy of Sciences of Ukraine 2020
• Теми: synchronous explicit-pole generator; vector diagram; armature reaction; electrical equivalent circuit.
• Онлайн доступ: https://ve.org.ua/index.php/journal/article/view/269
• Назва журналу: Vidnovluvana energetika

Synchronous generators with an explicit pole are widely used in wind and low-power hydropower plants. Today, the problem of using powerful autonomous wind power plants with synchronous generators to accumulate part of the energy generated by them at pumped hydro storage power station is becoming relevant. The development of rational circuit and technical solutions for the implementation of this technology for multi-unit wind-electric station requires analysis of the load modes of operation of all components in a wide range of operating wind speeds and rotor rotation speeds. Effective modeling and computational studies of electromechanical processes in these systems can be realized by using substitution electrical circuit of generators and motors, but for an explicit pole synchronous generator it is impossible to build an accurate electrical equivalent circuit for the electromotive force of the armature winding. In the framework of this study, an approximate electrical equivalent circuit diagram of the phase explicit pole synchronous generator was developed and an estimate of possible errors in the calculation of the parameters of the load mode of the circuit at different values of the rotor speed has been performed. The scheme is based on the sequential switching on of the active resistance of the armature winding and inductive resistances of scattering and lumbar reaction of the armature, as well as inductive resistance due to the combined action of the lumbar and longitudinal reactions of the armature. The expected errors in determining the calculated voltage parameters of consumers of autonomous power supply systems based on wind and hydroelectric installations with synchronous explicit pole generators using the developed electrical equivalent circuit do not exceed 2.5% modulus and 1.5 electric degrees per phase for arbitrary generator rotor speed. in the range of 0.6 ... 1.2 nominal value. The application of the developed electrical equivalent circuit of the explicit pole synchronous generator provides opportunities for automated multivariate calculation studies of electromechanical transients in power supply systems based on wind-electric and hydroelectric installations taking into account wind speed pulsations, changes in water flow discharge and water head, load changes. Ref. 24, tab. 3, fig. 3.